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This paper investigates vehicle health monitoring system (VHMS) on electric wheel truck. VHMS is connected with the control system of the electric wheel truck. It has local real-time system clock, mass size nonvolatile memory, and several interfaces such as Universal Serial Bus (USB), RS-232 and Ethernet for data transmission and download communication. Using General Packet Radio Service (GPRS) module,...
This paper presents a new approach for wide area dynamic monitoring of the system with many possible applications. One such application is discussed to provide real time stability controls. The new approach utilizes a substation based dynamic state estimation. The substation based dynamic state estimation uses data from relays, PMUs, meters, FDRs etc in the substation only thus avoiding all issues...
Based on the concept of hybrid shift-invariant spaces, we develop a distributed protocol for the reconstruction of time-varying physical fields in wireless sensor networks. The localized nature of these spaces allows for a clustered network architecture that leads to low communication overhead. Capitalizing on the sparsity of the reconstruction matrix, we propose an iterative reconstruction algorithm...
The main components of fossil power plant such as boiler, turbine, and generator are independently managed by separated control systems which have totally different platforms. However, recently, many fossil power plants request Integrated Monitoring and Control System (IMCS) which has standardized single platform and control system by reason of effective management. This paper presents the development...
This study presents the design of subsidence monitoring system for industrial machine alignment based on magnetic field method. The system was developed to demonstrate the level of land subsidence in the area of the industrial machine located. A computer was used to collect the data and to display the angles of subsidence over operation period. The measurement module consists of two thin-and-curve...
In a number of scenarios, services generated using a model-driven development (MDD) approach could benefit from ??reflective?? access to the information in the models from which they have been generated. Examples are monitoring, auditing, reporting, and business intelligence scenarios. Some of the information contained in the models of a service can statically be generated into its source code. In...
Within service orientation (SO) web services (WS) are the defacto standard for implementing service-oriented systems. While consumers of WS want to get uninterrupted and reliable service from the service providers WS providers can not always provide services in the expected level due to faults and failures in the system. As a result the fault management of these systems is becoming crucial. This work...
Reducing maintenance cost is very important for electric power utilities in order to have the advantage in competitive power market. Besides the reliability of facilities is required to be kept in certain level. In such situation, it is necessary to know the machine condition surely in order to conduct condition based maintenance (CBM).
Eddy current proximity probes are used extensively for monitoring shaft vibration of large motors and generators, especially those manufactured to American Petroleum Institute specifications [1] [2]. It is important to minimize proximity probe track runout, which is also known as slow roll runout, so as to minimize the measurement error when monitoring and diagnosing vibration. Customer specifications...
As mechanical vibration usually exists in HV motors and generators, its influence on the partial discharge (PD) needs to be studied so as to improve the reliability of on-line PD monitoring method. In this report, the mechanical vibration frequency was synchronized to the power frequency and the effects of vibration phase were investigated. Because the length of the discharge gap changed with the...
The transient field-circuit model of large generators has been studied, and the field-circuit analysis for the transient over-voltage of large power stations is presented. For the large generator stricken by the over-voltage from power stations, the transient field distribution in the stator winding insulator can be analyzed on line, and some insulation fault point and domain in generators can be...
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